1//===----------------------------------------------------------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is dual licensed under the MIT and the University of Illinois Open
6// Source Licenses. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10// <functional>
11
12// equal_to
13
14#include <functional>
15#include <type_traits>
16#include <cassert>
17
18int main()
19{
20    typedef std::equal_to<int> F;
21    const F f = F();
22    static_assert((std::is_same<int, F::first_argument_type>::value), "" );
23    static_assert((std::is_same<int, F::second_argument_type>::value), "" );
24    static_assert((std::is_same<bool, F::result_type>::value), "" );
25    assert(f(36, 36));
26    assert(!f(36, 6));
27#if _LIBCPP_STD_VER > 11
28    typedef std::equal_to<> F2;
29    const F2 f2 = F2();
30    assert(f2(36, 36));
31    assert(!f2(36, 6));
32    assert(f2(36, 36.0));
33    assert(f2(36.0, 36L));
34
35    constexpr bool foo = std::equal_to<int> () (36, 36);
36    static_assert ( foo, "" );
37
38    constexpr bool bar = std::equal_to<> () (36.0, 36);
39    static_assert ( bar, "" );
40#endif
41}
42